an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust 同义词：contrail,
例句与用法
1.
The word " contrail " comes from condensation trails 英文" contrail "意即是凝结
2.
Condensation trails contrails produced by aircraft 飞机航行时所产生的凝结尾迹。
3.
Scientists have long known that airplane condensation trails act to both cool and heat the atmosphere 科学家早已知道，飞机后方的凝结尾对大气同时具有冷却与加温的效果。
4.
Condensation trails contrails are formed high in the sky where water vapour from aircraft exhaust condenses in the surrounding cold air , producing water droplets and or ice crystals 飞机在高空航行时排出水气，水气被周围的冷空气冷凝下来，结成水点或冰晶，在高空留下了一条痕迹，称为凝结尾迹。
5.
Condensation trails ( contrails ) are formed high in the sky where water vapour from aircraft exhaust condenses in the surrounding cold air , producing water droplets andor ice crystals . they appear as narrow , sometimes rather straight , streaks on satellite cloud images 飞机在高空航行时排出水气，水气被周围的冷空气冷凝下来，结成水点或冰晶，在高空留下了一条痕迹，称为凝结尾迹。
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